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Tolerance
Welded Austenitic Stainless Steel Tubes for Heat-Exchanger , General Service & Food-Industrial Tubing. .ASTM A249 , A269 , A270 , JIS G3447 & G3463 , CNS 6668 , 7383
 
Grade / Item
Outside Diameter

Thickness

 Length
ASTM A249
--

<25mm

 ±0.10mm -0.11mm
≧25mm ≦40mm ±0.15mm --
>40mm <50mm ±0.20mm --
>50mm <65mm ±0.25mm --
≧65mm <75mm ±0.30mm --
≧75mm ≦100mm ±0.38mm --
>100mm ≦200mm +0.38mm -0.64mm
>200mm ≦225mm +0.38mm -1.14mm
±10%
OD<50.8mm +3.0mm
  - 0mm
OD<50.8mm +5.0mm
  - 0mm
ASTM A269
--

<38.1mm

 ±0.13mm --
≧38.1mm <88.9mm ±0.25mm --
≧88.9mm <139.7mm ±0.38mm --
≧139.7mm <203.2mm ±0.76mm --
OD<12.7mm±15%
OD≧12.7mm±10%		 OD<38.1mm+3.2mm-0mm
OD<38.1mm+5.0mm-0mm
ASTM A270
--

≦25.4mm

 ±0.13mm --
>25.4mm ≦50.8mm ±0.20mm --
>50.8mm ≦76.2mm ±0.25mm --
>76.2mm ≦101.6mm ±0.38mm --
>101.6mm <139.7mm ±0.38mm --
±12.5%
OD<101.6mm +3.2mm
  - 0mm
OD<101.6mm +4.8mm
  - 0mm
 

CNS 6668
JIS G3447
--

≦25.4mm

 ±0.15mm --
>25.4mm ≦31.8mm ±0.16mm --
>31.8mm ≦38.1mm ±0.19mm --
>38.1mm ≦76.3mm ±0.25mm --
>76.3mm ≦89.1mm +0.30mm -0.40mm
>89.1mm ≦101.6mm +0.35mm -0.40mm
>101.6mm ≦114.3mm +0.40mm -0.60mm
>114.3mm ≦139.8mm +0.40mm -0.80mm
>139.8mm ≦165.2mm +0.40mm -1.20mm
±10% +10mm
- 0mm
CNS 7383
JIS G3463
-- <60mm +0.25mm --
≧60mm <80mm +0.30mm --
≧80mm <100mm +0.40mm --
≧100mm <120mm +0.40mm -0.60mm
≧120mm <160mm +0.40mm -0.80mm
≧160mm <200mm +0.40mm -1.20mm
≧200mm -- +0.40mm -1.60mm
OD<40mm t < 2mm +0.4mm
    - 0
OD<40mm t ≧2mm +20%
    - 0
OD<40mm   +22%
    - 0
OD<50mm +7mm
  -0mm
OD<50mm +10mm
  -0mm
 

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